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diff --git a/plugins/arm/v7/opdefs/A887_add.d b/plugins/arm/v7/opdefs/A887_add.d
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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * ##FILE## - traduction d'instructions ARMv7
+ *
+ * Copyright (C) 2017 Cyrille Bagard
+ *
+ *  This file is part of Chrysalide.
+ *
+ *  Chrysalide is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Chrysalide is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+@title ADD (register, ARM)
+
+@id 6
+
+@desc {
+
+	This instruction adds a register value and an optionally-shifted register value, and writes the result to the destination register. It can optionally update the condition flags based on the result.
+
+}
+
+@encoding (A1) {
+
+	@word cond(4) 0 0 0 0 1 0 0 S(1) Rn(4) Rd(4) imm5(5) type(2) 0 Rm(4)
+
+	@syntax {
+
+		@subid 22
+
+		@assert {
+
+			S == 0
+
+		}
+
+		@conv {
+
+			reg_D = Register(Rd)
+			reg_N = Register(Rn)
+			reg_M = Register(Rm)
+			shift = DecodeImmShift(type, imm5)
+
+		}
+
+		@asm add ?reg_D reg_N reg_M ?shift
+
+		@rules {
+
+			check g_arm_instruction_set_cond(cond)
+
+		}
+
+	}
+
+	@syntax {
+
+		@subid 23
+
+		@assert {
+
+			S == 1
+
+		}
+
+		@conv {
+
+			reg_D = Register(Rd)
+			reg_N = Register(Rn)
+			reg_M = Register(Rm)
+			shift = DecodeImmShift(type, imm5)
+
+		}
+
+		@asm adds ?reg_D reg_N reg_M ?shift
+
+		@rules {
+
+			check g_arm_instruction_set_cond(cond)
+
+		}
+
+	}
+
+}
+